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Stellar Occultation by (850) Altona on 2023-12-29 (20:08:55 UT)

CTU: Cross-track uncertainty (zero means: use the nominal prediction value, see event details below). Offsets and CTU all in mas.


Event Details
 Occultation UUID [and db] : 29dccfc4-9818-4213-a349-5eff708851a1 [observed]

 Occultation Date + Time   : 2023-12-29 at 20:08:55 UT +/- 0.02 min  [1]
 Object Designation        : (850) Altona
 Star Designation          : GDR3 3356480142549292544
 Star Coordinates (ICRF)   : RA = 06 30 47.8535, DE = +14 20 22.049  [2]
 Star Magnitudes           : G = 14.61 mag, RP = 13.71 mag, BP = 15.42 mag
 Object Magnitude          : V = 14.52 mag
 Estimated Magnitude Drop  : 0.7 mag
 Estimated Max. Duration   : 5.1 sec
 Object Mean Diameter      : 80.9 km  (src: astorb)
 Orbital Class             : MBA
 Speed of the shadow       : 15.9 km/s
 Elongation to Moon & Sun  : 35° (sunlit = 92%), Sun = 171°
 Cross-track uncertainty   : 2.3 mas = 3 km = 0.05 path-width (1-sig)
 RUWE and duplicate source : 0.99 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#67

 
 [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0


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